Be warned that these programs have been written not as general-purpose
utilities, but rather as optimized programs to do the job at hand as
fast as possible, and that no documentation nor support comes with
them, so use them at your own risk. In order to compile them,
you will need a copy of Sam Leffler's
TIFF Library.
All programs are known to work with TIFF files with the following
characteristics:

Bits/Sample: 1

Image Width: a multiple of 32

Compression Scheme: CCITT Group 4 facsimile encoding

Photometric Interpretation: min-is-white

Planar Configuration: single image plane

Samples/Pixel: 1

Rows/Strip == Image Length (i.e. image consists of one strip).
BTW: I think this is a requirement only for tiff2ps and tiff2pdf.

As stated above, all these programs come with no documentation nor
support, but I welcome any comments or improvements.
If you don't get the expected results when running the code on your
images, you should make sure that the image characteristics match the
ones listed above. This can be done by running the program
tiffinfo, which comes with the TIFF library.